R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 158

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
14.1.2
Table 14.3
NOTE:
Count sources
Count operations
Divide ratio
Count start condition
Count stop conditions • 0 (count stops) is written to the TSTART bit in the TRACR register.
Interrupt request
generation timing
INT1/TRAIO pin
function
TRAO pin function
Read from timer
Write to timer
Select functions
1. The level of the output pulse becomes the level when the pulse output starts when the TRAMR
In pulse output mode, the internally generated count source is counted, and a pulse with inverted polarity is
output from the TRAIO pin each time the timer underflows (refer to Table 14.3 Pulse Output Mode
Specifications).
Figure 14.6 shows the TRAIOC Register in Pulse Output Mode.
register is written to.
Feb 29, 2008
Item
Pulse Output Mode
Pulse Output Mode Specifications
1 (count starts) is written to the TSTART bit in the TRACR register.
Page 139 of 485
f1, f2, f8, fOCO, fC32
• Decrement
• When the timer underflows, the contents in the reload register is reloaded and
1/(n+1)(m+1)
n: Value set in TRAPRE register, m: Value set in TRA register
• 1 (count forcibly stops) is written to the TSTOP bit in the TRACR register.
When timer RA underflows [timer RA interrupt].
Pulse output, programmable output port, or INT1 interrupt
Programmable I/O port or inverted output of TRAIO
The count value can be read by reading registers TRA and TRAPRE.
• When registers TRAPRE and TRA are written while the count is stopped, values
• When registers TRAPRE and TRA are written during the count, values are
• TRAIO output polarity switch function
• TRAO output function
• Pulse output stop function
• INT1/TRAIO pin select function
the count is continued.
are written to both the reload register and counter.
written to the reload register and counter (refer to 14.1.1.1 Timer Write Control
during Count Operation).
The TEDGSEL bit in the TRAIOC register selects the level at the start of pulse
output.
Pulses inverted from the TRAIO output polarity can be output from the TRAO
pin (selectable by the TOENA bit in the TRAIOC register).
Output from the TRAIO pin is stopped by the TOPCR bit in the TRAIOC
register.
P1_7 or P1_5 is selected by the TIOSEL bit in the TRAIOC register.
(1)
Specification
(1)
(1)
14. Timers